<template>
    <div class="table">
        <div class="crumbs" style="padding: 20px 0 5px 20px">
            <i class="iconfont icon-r-list" style="font-size: 24px">
                歌曲信息</i
            >
        </div>
        <div class="container">
            <div class="handle-box">
                <el-input
                    v-model="select_word"
                    placeholder="请输入歌曲名"
                    class="handle-input"
                ></el-input
                ><br /><br />
                <el-button type="danger" style="font-size: 18px" @click="delAll"
                    >
                    批量删除</el-button
                >
                <el-button
                    type="primary"
                    style="font-size: 18px"
                    @click="centerDialogVisible = true"
                    >
                    添加歌曲</el-button
                >
            </div>
        </div>
        <el-table
            ref="multipleTable"
            border
            style="width: 100%"
            height="680px"
            :data="data"
            @selection-change="handleSelectionChange"
        >
            <el-table-column type="selection" width="40"></el-table-column>
            <el-table-column label="歌曲图片" width="110" align="center">
                <template slot-scope="scope">
                    <div class="song-img">
                        <img :src="getUrl(scope.row.pic)" style="width: 100%" />
                    </div>
                    <div
                        class="play"
                        @click="setSongUrl(scope.row.url, scope.row.name)"
                    >
                        <div v-if="toggle == scope.row.name">
                            <svg class="icon">
                                <use xlink:href="#icon-zanting"></use>
                            </svg>
                        </div>
                        <div v-if="toggle != scope.row.name">
                            <svg class="icon">
                                <use xlink:href="#icon-bofanganniu"></use>
                            </svg>
                        </div>
                    </div>
                </template>
            </el-table-column>
            <el-table-column
                prop="name"
                label="歌手-歌名"
                width="120"
                align="center"
            ></el-table-column>
            <el-table-column
                prop="introduction"
                label="专辑"
                width="150"
                align="center"
            ></el-table-column>
            <el-table-column label="歌词" align="center">
                <template slot-scope="scope">
                    <ul style="height: 100px; overflow: scroll">
                        <li
                            v-for="(item, index) in parseLyric(scope.row.lyric)"
                            :key="index"
                        >
                            {{ item }}
                        </li>
                    </ul>
                </template>
            </el-table-column>
            <el-table-column label="资源更新" align="center" width="180">
                <template slot-scope="scope">
                    <el-upload
                        :action="uploadUrl(scope.row.id)"
                        :before-upload="beforeAvatorUpload"
                        :on-success="handleAvatorSuccess"
                    >
                        <el-button> 更新图片</el-button>
                    </el-upload>
                    <br />
                    <el-upload
                        :action="uploadSongUrl(scope.row.id)"
                        :before-upload="beforeSongUpload"
                        :on-success="handleSongSuccess"
                    >
                        <el-button> 更新歌曲</el-button>
                    </el-upload>
                </template>
            </el-table-column>

            <el-table-column label="操作" width="250" align="center" fixed="right">
                <template slot-scope="scope">
                    <el-button type="success" @click="handleEdit(scope.row)" style="font-size: 18px;"
                        > 编辑</el-button
                    >
                    <el-button
                        type="danger"
                        @click="handleDelete(scope.row.id)" style="font-size: 18px;"
                        > 删除</el-button
                    >
                </template>
            </el-table-column>
        </el-table>
        <div class="pagination">
            <el-pagination
                background
                layout="total,prev,pager,next"
                :current-page="currentPage"
                :page-size="pageSize"
                :total="tableData.length"
                @current-change="handleCurrentChange"
            >
            </el-pagination>
        </div>

        <el-dialog
            title="添加歌曲"
            :visible.sync="centerDialogVisible"
            width="400px"
            center
        >
            <el-form
                :model="registerForm"
                ref="registerForm"
                label-width="80px"
                action=""
                id="tf"
            >
                <div>
                    <label>歌名</label>
                    <el-input type="text" name="name"></el-input>
                </div>
                <div>
                    <label>专辑</label>
                    <el-input type="text" name="introduction"></el-input>
                </div>
                <div>
                    <label>歌词</label>
                    <el-input type="textarea" name="lyric"></el-input>
                </div>
                <div>
                    <label>歌曲上传</label>
                    <input type="file" name="file" />
                </div>
            </el-form>
            <span slot="footer">
                <el-button size="mini" @click="centerDialogVisible = false"
                    > 取消</el-button
                >
                <el-button size="mini" @click="addSong" type="primary"> 确定</el-button>
            </span>
        </el-dialog>

        <el-dialog
            title="修改歌曲"
            :visible.sync="editVisible"
            width="400px"
            center
        >
            <el-form :model="form" ref="form" label-width="80px">
                <el-form-item prop="name" label="歌手-歌名" size="mini">
                    <el-input
                        v-model="form.name"
                        placeholder="歌手-歌名"
                    ></el-input>
                </el-form-item>
                <el-form-item prop="introduction" label="专辑" size="mini">
                    <el-input
                        v-model="form.introduction"
                        placeholder="专辑"
                    ></el-input>
                </el-form-item>
                <el-form-item prop="lyric" label="歌词" size="mini">
                    <el-input
                        v-model="form.lyric"
                        placeholder="歌词"
                        type="textarea"
                    ></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer">
                <el-button size="mini" @click="editVisible = false"
                    > 取消</el-button
                >
                <el-button size="mini" @click="editSave" type="primary"> 确定</el-button>
            </span>
        </el-dialog>

        <el-dialog
            title="删除歌曲"
            :visible.sync="delVisible"
            width="300px"
            center
        >
            <div align="center">删除不可恢复，是否确定删除？</div>
            <span slot="footer">
                <el-button size="mini" @click="delVisible = false"
                    > 取消</el-button
                >
                <el-button size="mini" @click="deleteRow" type="primary"> 确定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
import { mixin } from "../mixins/index";
import { mapGetters } from "vuex";
import "@/assets/js/iconfont.js";
import { songOfSingerId, updateSong, delSong } from "../api/index";

export default {
    mixins: [mixin],
    data() {
        return {
            singerId: "", //歌手id
            singerName: "", //歌手名
            centerDialogVisible: false, //添加弹窗是否显示
            editVisible: false, //编辑弹窗是否显示
            delVisible: false, //删除弹窗是否显示
            registerForm: {
                //添加框
                name: "",
                singerName: "",
                introduction: "",
                lyric: "",
            },
            form: {
                //编辑框
                id: "",
                name: "",
                introduction: "",
                lyric: "",
            },
            tableData: [],
            tempData: [],
            select_word: "",
            pageSize: 5, //分页每页大小
            currentPage: 1, //当前页
            idx: -1, //当前选择项
            multipleSelection: [], //哪些项已经打勾
            toggle: false, //播放器的图标状态
        };
    },
    computed: {
        ...mapGetters(["isPlay"]),
        //计算当前搜索结果表里的数据
        data() {
            return this.tableData.slice(
                (this.currentPage - 1) * this.pageSize,
                this.currentPage * this.pageSize
            );
        },
    },
    watch: {
        //搜索框里面的内容发生变化的时候，搜索结果table列表的内容跟着它的内容发生变化
        select_word: function () {
            if (this.select_word == "") {
                this.tableData = this.tempData;
            } else {
                this.tableData = [];
                for (let item of this.tempData) {
                    if (item.name.includes(this.select_word)) {
                        this.tableData.push(item);
                    }
                }
            }
        },
    },
    created() {
        this.singerId = this.$route.query.id;
        this.singerName = this.$route.query.name;
        this.getData();
    },
    destroyed() {
        this.$store.commit("setIsPlay", false);
    },
    methods: {
        //获取当前页
        handleCurrentChange(val) {
            this.currentPage = val;
        },
        //查询所有歌手
        getData() {
            this.tempData = [];
            this.tableData = [];
            songOfSingerId(this.singerId).then((res) => {
                this.tempData = res;
                this.tableData = res;
                this.currentPage = 1;
            });
        },
        //添加歌手
        addSong() {
            let _this = this;
            var form = new FormData(document.getElementById("tf"));
            form.append("singerId", this.singerId);
            form.set("name", this.singerName + "-" + form.get("name"));
            if (!form.get("lyric")) {
                form.set("lyric", "[00:00:00]暂无歌词");
            }
            var req = new XMLHttpRequest();
            req.onreadystatechange = function () {
                //req.readyState == 4 获取到返回的完整数据
                //req.status == 200 和后台正常交互完成
                if (req.readyState == 4 && req.status == 200) {
                    let res = JSON.parse(req.response);
                    if (res.code) {
                        _this.getData();
                        _this.registerForm = {};
                        _this.notify(res.msg, "success");
                    } else {
                        _this.notify("保存失败", "error");
                    }
                }
            };
            req.open("post", `${_this.$store.state.HOST}/song/add`, false);
            req.send(form);
            _this.centerDialogVisible = false;
        },
        //弹出编辑页面
        handleEdit(row) {
            this.editVisible = true;
            this.form = {
                id: row.id,
                name: row.name,
                introduction: row.introduction,
                lyric: row.lyric,
            };
        },
        //保存编辑页面修改的数据
        editSave() {
            let params = new URLSearchParams();
            params.append("id", this.form.id);
            params.append("name", this.form.name);
            params.append("introduction", this.form.introduction);
            params.append("lyric", this.form.lyric);

            updateSong(params)
                .then((res) => {
                    if (res.code == 1) {
                        this.getData();
                        this.notify("修改成功", "success");
                    } else {
                        this.notify("修改失败", "error");
                    }
                })
                .catch((err) => {
                    console.log(err);
                });
            this.editVisible = false;
        },
        //更新图片
        uploadUrl(id) {
            return `${this.$store.state.HOST}/song/updateSongPic?id=${id}`;
        },
        //删除一名歌手
        deleteRow() {
            delSong(this.idx)
                .then((res) => {
                    if (res) {
                        this.getData();
                        this.notify("删除成功", "success");
                    } else {
                        this.notify("删除失败", "error");
                    }
                })
                .catch((err) => {
                    console.log(err);
                });
            this.delVisible = false;
        },
        //解析歌词
        parseLyric(text) {
            let lines = text.split("\n");
            let pattern = /\[\d{2}:\d{2}.(\d{3}|\d{2})\]/g;
            let result = [];
            for (let item of lines) {
                let value = item.replace(pattern, "");
                result.push(value);
            }
            return result;
        },
        //上传歌曲之前的校验
        beforeSongUpload(file) {
            var testMsg = file.name.substring(file.name.lastIndexOf(".") + 1);
            if (testMsg != "mp3") {
                this.$message({
                    message: "上传文件只能是mp3格式",
                    type: "error",
                });
                return false;
            }
            return true;
        },
        //上传歌曲成功之后要做的工作
        handleSongSuccess(res) {
            let _this = this;
            if (res.code == 1) {
                _this.getData();
                _this.$notify({
                    title: "上传成功",
                    type: "success",
                });
            } else {
                _this.$notify({
                    title: "上传失败",
                    type: "error",
                });
            }
        },
        //更新歌曲url
        uploadSongUrl(id) {
            return `${this.$store.state.HOST}/song/updateSongUrl?id=${id}`;
        },
        //切换播放歌曲
        setSongUrl(url, name) {
            this.toggle = name;
            this.$store.commit("setUrl", this.$store.state.HOST + url);
            if (this.isPlay) {
                this.$store.commit("setIsPlay", false);
            } else {
                this.$store.commit("setIsPlay", true);
            }
        },
    },
};
</script>

<style scoped>
.handle-box {
    margin-bottom: 20px;
}
.song-img {
    width: 100%;
    height: 80px;
    border-radius: 5px;
    margin-bottom: 5px;
    overflow: hidden;
}
.handle-input {
    width: 300px;
    display: inline-block;
}
.pagination {
    display: flex;
    justify-content: center;
}
.play {
    position: absolute;
    z-index: 100;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    top: 18px;
    left: 15px;
}

.icon {
    width: 2em;
    height: 2em;
    color: white;
    fill: currentColor;
    overflow: hidden;
}
</style>